Consider the minimally reproducible example: f = @(x) x f(end) Note, the MATLAB syntax highlighter doesn't actually highlight end in blue, showing that it is not parsing as a keyword, even though ...

What is the relationship between reference of tuple and tuple of reference as types? Why does the first works but the second doesn't? let a = 1; let b = 2; // This works, c: &i32, d:&i32 le...

This is a simple example: object CoerciveCovariance { trait Cov[+T] def cast[A, B](v: Cov[A])( implicit ev: A <:< B ) = { v: Cov[B] } } It doesn't compile: CoerciveCovariance.scala...

When doing rustlings standard_library_types/iterators2.rs, I started wondering how std::iter::Iterator::map calls its argument closure/function. More specifically, suppose I have a function // &quo...

I would like to define a button's padding the same way as in C# XAML files. Instead of writing things like: <Button fx:id="btn1" ...> <padding> <Insets top="0" right="5" bottom="1...

I am trying to achieve the functionality similar to unlist, with the exception that types are not coerced to a vector, but the list with preserved types is returned instead. For instance: flatten(...

I'm comparing strings with comparison operators. I need some sort of explanation for the below two comparisons and their result. if('ai' > 'i') { echo 'Yes'; } else { echo 'No'; } output: No ...

I know == operator performs the type coercion. But I can't understand the below behaviour. const x = new Boolean(false); if (x) { console.log("if(x) is true"); } if (x == false) { c...

Let's say I have a value defined as a sort of commission formula let address_commission = 1.0 // minimal simplified example and I want to apply the above said commission to an amount I'm reading...

Given that a literal number not strictly an instance of Number, why can I call prototype methods of Number (or String, or Boolean) objects on the corresponding literal objects? Is this standard beh...

According to the ECMA script standard, the following code should return true, but it doesn't: d = new Date() ; d.setTime(1436497200000) ; alert( d == 1436497200000 ) ; Section 11.9.3 says: ...

According to this table in the ECMAScript standard, string values that have length 0 should be evaluated as boolean false. How come, then, these statements evaluate to true? "\t" == false " " == ...

It is said that when we have a class Point and knows how to perform point * 3 like the following: class Point def initialize(x,y) @x, @y = x, y end def *(c) Point.new(@x * c, @y * c) end en...

I program in Java, C and Python. The rule for automatic coercions among arithmetic types have been augmented to handle the richer set of types Source: "The C Programming Language"...

Why does (int 10) not produce an instance of type java.lang.Integer? ; why Long here? => (type (int 10)) ; java.lang.Long ; this one is also Long, why not java.lang.Number? => (type (num 10...

I've been reading about JavaScript hoisting sometime back. JavaScript Scoping and Hoisting by Ben Cherry Two words about “hoisting” by Dmitry Soshnikov and, some more about JavaScript type-coercio...

The following code in Groovy adds GStrings to the list: List<String> args = [ 'cmd', "-Dopt=${value}" ] When I create a ProcessBuilder with this list, I get a ClassCastException. What's a ...

In JavaScript... '\t\n ' == false // true I can assume that any string that consists solely of whitespace characters is considered equal to false in JavaScript. According to this article, I fig...

data: function( elem, name, data ) { if ( !jQuery.acceptData( elem ) ) { return; } elem = elem == window ? windowData : elem; Copied directly from the jQuery source. Why is it not safe to us...